Table 3.
Accuracy of pulse oximeters in detecting hypoxaemia (prevalence of SaO2 ≤90% is 5.1%)
| Pulse oximeter | TP/FN | FP/TN | Sensitivity | Specificity | PPV | NPV | Accuracy |
| AFAC FS10D | 9/3 | 46/174 | 75 (43–95) | 79 (73–84) | 16 (11–23) | 98 (96–99) | 79 (73–84) |
| AGPTEK FS10C | 10/2 | 39/182 | 83 (52–98) | 82 (77–87) | 20 (15–27) | 99 (96–100) | 82 (77–87) |
| ANAPULSE ANP 100 | 10/1 | 79/112 | 91 (59–100) | 59 (51–66) | 11 (9–14) | 99 (95–100) | 60 (53–67) |
| Cocobear | 10/2 | 63/151 | 83 (52–98) | 71 (64–77) | 14 (10–18) | 99 (96–100) | 71 (65–77) |
| Contec CMS50D1 | 7/5 | 16/200 | 58 (28–85) | 93 (88–96) | 30 (18–46) | 98 (95–99) | 91 (86–94) |
| HYLOGY MD-H37 | 11/1 | 51/169 | 92 (62–100) | 77 (71–82) | 18 (14–22) | 99 (96–100) | 78 (72–83) |
| Mommed YM101 | 9/3 | 31/186 | 75 (43–95) | 86 (80–90) | 23 (15–32) | 98 (96–99) | 85 (80–89) |
| PRCMISEMED F4 PRO | 8/4 | 39/182 | 67 (35–90) | 82 (77–87) | 17 (11–25) | 98 (95–99) | 82 (76–86) |
| PULOX-PO-200 | 9/3 | 30/189 | 75 (43–95) | 86 (81–91) | 23 (16–32) | 98 (96–99) | 86 (81–90) |
| Zacurate Pro Series 500 DL | 8/2 | 19/183 | 80 (44–97) | 91 (86–94) | 30 (20–42) | 99 (96–100) | 90 (85–94) |
The values for PPV, NPV and accuracy are dependent on disease prevalence.
FN, false negative; FP, false positive; NPV, negative predictive value; PPV, positive predictive value; TN, true negative; TP, true positive.